221111200022111 has 12 divisors (see below), whose sum is σ = 257211252193392. Its totient is φ = 189523690903008.

The previous prime is 221111200022101. The next prime is 221111200022129. The reversal of 221111200022111 is 111220002111122.

It is not a de Polignac number, because 221111200022111 - 2¹⁴ = 221111200005727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221111200022111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111200022101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66395651 + ... + 69646283.

It is an arithmetic number, because the mean of its divisors is an integer number (21434271016116).

Almost surely, 2^{221111200022111} is an apocalyptic number.

221111200022111 is a deficient number, since it is larger than the sum of its proper divisors (36100052171281).

221111200022111 is a wasteful number, since it uses less digits than its factorization.

221111200022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4638830 (or 4638823 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221111200022111 its reverse (111220002111122), we get a palindrome (332331202133233).

The spelling of 221111200022111 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred million, twenty-two thousand, one hundred eleven".